Reference no: EM132398975

Middle East College

Relational Database Systems (COMP 1005)

Individual Assignment

Objective: This is an individual assignment aimed to give the student exposure in understanding, designing, building and analyzing database systems for a given real-time based scenario and be able to conduct optimal strategies for efficient management of databases.
Intended Learning Outcomes covered:

1. Design the logical structure of a database using Entity-Relationship diagram.

2. Apply normalization techniques to reduce redundancy in a database.

Task 1:

Complete the work proposal in Microsoft Word file format (may include possible answers based on your initial understanding). Work proposal for the assignment must be submitted before 23:59 Hrs on Wednesday, 20/11/2019 and must include:

a) Understanding of deliverables - a detail description of deliverables.
b) General overview of proposed plan - initial understanding of solution to task 2 which includes, the name of entities, associative entities and relationships and a brief write up on the concept of referential integrity. Initial understanding of solution to task 3 which includes the process to be followed for normalization and a brief write up on the concept of data integrity.
c) Timeline and references for completion of task 2 and task 3.

Task 2:

Scenario:

Consider the following scenario of a baby day care center. The owner wants to maintain a database for easy access to records related to the day care and other things. The requirements are as follows:

The parents seek admission to the day care center for their child. The owner wants to maintain a detail of the parents of the children seeking day care services. The new parents are given a new identification number. Other details regarding the parents will be the father's name, mother's name, the house address, father's GSM, mother's GSM to contact them, number of their children in day care. The details regarding the child includes: child identification number, gender, age, parent identification number as reference and the timings. When a child is admitted by the parent the owner wishes to record the following details: date of admission and the total fees. A parent may have one or more children admitted in the day care but a child will be associated to only one parent. There are many supervisors in the day care to care of the children. Each child is assigned a supervisor. A supervisor however may take care off one or more children. The day care also offers transport services. A child may avail the transport or may not avail. One transport has to be associated with at least one child but may carry many children.

a) Construct the Entity Relationship Diagram (ERD) for the above given scenario. Identify all the entities, associative entities, attributes of each entity including primary key, relationship between the entities and cardinality constraints. State any assumptions necessary to support your design.

NOTE: The attribute names chosen should be meaningful and should be different for each student to avoid similarity in the submitted work. The students are advised to add the last 4 digits of their student id to the names of the attributes to avoid similarity with other students' work.

b) Analyze the above given scenario and discuss about the possible structure of any two relations by giving the details on the datatype and the size of each attribute. State any assumptions necessary to support your design.

c) Discuss the possible domain constraints to be implemented in the design given in (b) part to make the design better. State any assumptions necessary to support your design.

Task 3:
a) Normalize the below given Form to First Normal Form, Second Normal Form and Third Normal Form. Make assumptions for the identification of the primary key wherever necessary.
b) Give a reflection of how normalization will help in easy maintenance of the database.
Support your answer with reference to the above Question. (At least 150 words)
c) Discuss the implementation of integrity constraints in the above scenario. (maximum 400 words)

Task 4

Be ready for a written viva to demonstrate your knowledge with the different concepts used in preparing the assignment. Schedule for the written viva will be announced in the class and on Moodle/MEC mail. Marks for task 2 and task 3 will depend on the satisfactory pass for the demonstration in task 4.

Attachment:- Relational Database Systems.rar